CN221102340U - A battery module and a battery pack - Google Patents

Abstract

The utility model discloses a battery module, comprising at least two module blocks arranged in parallel, wherein the module block comprises a plurality of cells arranged in sequence, the cells of two adjacent module blocks are aligned one by one, and the poles at the adjacent ends of the two aligned cells of the two adjacent module blocks are a group; an intermediate aluminum bar, which connects a group of poles in series to connect the two aligned cells of the two adjacent module blocks; an intermediate FPC, which is connected to the intermediate aluminum bar; the outermost two rows of poles of the two outer module blocks are respectively a first pole row and a second pole row; the positive and negative poles of the poles of the first pole row are self-connected, and the positive and negative poles of the poles of the second pole row are self-connected, so that all the cells of the two module blocks form a series circuit; a battery pack, comprising a battery module and a box; the battery module is arranged in the box; the adjacent poles between the adjacent module blocks share a middle aluminum bar, and one middle aluminum bar corresponds to one middle FPC, so that the use of the original two FPCs is reduced to one, which simplifies the process and reduces the cost.

Description

A battery module and a battery pack

Technical Field

The utility model relates to the technical field of batteries, and in particular to a battery module and a battery pack.

Background technique

A battery pack usually includes multiple battery modules, and the CCS acquisition circuit of each battery module is usually set up separately for signal acquisition of each battery module.

Therefore, the CCS acquisition circuit of each battery module is designed separately, which increases the number of FPCs and increases production costs and processes.

Utility Model Content

In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a battery module and a battery pack, in which two adjacent poles of two adjacent battery cells of two adjacent module blocks share an intermediate aluminum bar, and one intermediate aluminum bar corresponds to one intermediate FPC, thereby reducing the original two FPCs to one, which simplifies the process and reduces the cost.

The technical solution adopted by the utility model to solve the problem is:

A battery module, comprising:

At least two module blocks arranged in parallel, the module blocks comprising a plurality of cells arranged in sequence, the cells of two adjacent module blocks being aligned one by one, and the poles at adjacent ends of the two cells aligned in two adjacent module blocks being a group;

An intermediate aluminum bar, which connects a group of the poles in series to connect two aligned battery cells of two adjacent module blocks;

A middle FPC connected to the middle aluminum bar;

The two outermost rows of poles of the two outer module blocks are respectively the first pole row and the second pole row; the positive and negative poles of each pole in the first pole row are self-connected, and the positive and negative poles of each pole in the second pole row are self-connected, so that all the battery cells of the two module blocks form a series circuit.

further,

In the arrangement direction of the battery cells, one end is the front end of the module block, and the other end is the rear end of the module block;

When the number of cells in the module block is an even number, the poles of the cells at the front end and the rear end of the first pole row are respectively used to connect to external circuits;

It also includes an outer aluminum bar, the remaining poles of the first pole row are grouped in pairs, and the outer aluminum bar connects the poles of a group of the first pole row; the poles of the second pole row are grouped in pairs, and the outer aluminum bar connects the poles of a group of the second pole row;

It also includes two outer FPCs, one of which is connected to the outer aluminum bar of the first pole row and the pole of the first pole row for connecting to an external circuit; the other outer FPC is connected to the outer aluminum bar of the second pole row;

or,

When the number of cells in the module block is an odd number, the poles of the cells at the front end of the first pole row and the poles at the rear end of the second pole row are respectively used to connect to external circuits;

It also includes an outer aluminum bar, the remaining poles of the first pole row are grouped in twos, and the outer aluminum bar connects the poles of a group of the first pole row; the remaining poles of the second pole row are grouped in twos, and the outer aluminum bar connects the poles of a group of the second pole row;

It also includes two outer FPCs, one of which is connected to the outer aluminum bar of the first pole row and the pole of the first pole row for connecting to an external line; the other outer FPC is connected to the outer aluminum bar of the second pole row and the pole outer FPC of the second pole row for connecting to an external line.

Further, it also includes an external aluminum bar;

The external aluminum bar is connected to the pole connected to the external line;

The outer FPC is connected to the external aluminum bar.

Further, it also includes a nickel sheet;

The middle FPC is connected to the middle aluminum bar through the nickel sheet;

The outer FPC is connected to the outer aluminum bar and the external aluminum bar through the nickel sheet.

Further, the middle FPC and the outer FPC are provided with output terminals;

A fuse is provided on the output end;

and / or,

A connector is arranged on the output end.

Furthermore, the fuse is a chip fuse.

Furthermore, it also includes a reinforcing plate,

The output end is arranged on the reinforcing plate so that the output end is supported.

Furthermore, the middle aluminum bar has a square structure, and the width of the middle aluminum bar with the square structure in the thickness direction of the battery cell is smaller than the thickness of the battery cell.

Furthermore, it also includes a blister bracket, which is arranged on the top of the module block, and the middle aluminum bar, the middle FPC, the outer aluminum bar, the outer FPC and the external aluminum bar are arranged on the blister bracket.

A battery pack comprises the battery module and a box, wherein the battery module is arranged in the box.

In summary, the battery module and battery pack provided by the utility model have the following technical effects:

1) Two adjacent poles of two adjacent cells of two adjacent module blocks share one middle aluminum bar, so one middle aluminum bar corresponds to one middle FPC, reducing the original two FPCs to one, which simplifies the process and reduces the cost;

2) The provision of the reinforcing plate ensures the installation support of various components on the output ends of the middle FPC 3 and the outer FPC 5, and improves the convenience of installation of the ends of the FPC.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the utility model;

FIG2 is an enlarged view of point A in FIG1 ;

FIG. 3 is a schematic diagram of the connection circuit of each battery cell of each module block of the present invention.

The meanings of the reference numerals are as follows:

1. Module block; 11. Battery cell; 2. Middle aluminum bar; 3. Middle FPC; 4. Outer aluminum bar; 5. Outer FPC; 6. External aluminum bar; 7. Nickel sheet; 8. Fuse; 9. Connector; 10. Reinforcement plate; 12. Blister bracket.

Detailed ways

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

Embodiment 1

Referring to Figures 1 and 2, the utility model discloses a battery module, comprising:

At least two module blocks 1 are arranged in parallel, the module block 1 includes a plurality of battery cells 11 arranged in sequence, the battery cells 11 of two adjacent module blocks 1 are aligned one by one, and the poles at the adjacent ends of the two battery cells 11 aligned in the two adjacent module blocks 1 form a group.

The middle aluminum bar 2 connects a group of poles in series to connect two battery cells 11 aligned with two adjacent module blocks 1. It should be noted that one of the two adjacent poles is a positive pole and the other is a negative pole. The middle FPC3 is connected to the middle aluminum bar 2. Preferably, the middle FPC3 is connected to the middle aluminum bar 2 through a nickel sheet 7. Specifically, each middle aluminum bar 2 is connected to a nickel sheet 7, and each nickel sheet 7 is respectively connected to the middle FPC3. One end of the middle FPC3 extends outward to the outside of the module block 1, and this end is the output end of the middle FPC3.

Referring to Figure 3, all the battery cells 11 of the two module blocks 1 form a series circuit. Specifically, the two outermost rows of poles of the two outer module blocks 1 are respectively the first pole row and the second pole row. The positive and negative poles of each pole row are self-connected, and the positive and negative poles of each pole row are self-connected (refer to the series connection of multiple DC power supplies, which is a prior art and will not be repeated). In the arrangement direction of the battery cells 11, one end is the front end of the module block 1, and the other end is the rear end of the module block 1; in this embodiment, the right end is the front end and the left end is the rear end.

More preferably, the middle aluminum bar 2 has a square structure. Preferably, the middle aluminum bar 2 has a rectangular structure. The four corners of the middle aluminum bar 2 with a rectangular structure are provided with rounded corners or chamfers to prevent sharp corners from bumping. The width dimension of the middle aluminum bar 2 with a square structure in the thickness direction of the battery cell 11 is smaller than the thickness dimension of the battery cell 11. In this way, the edge of the middle aluminum bar 2 in the width direction is prevented from protruding beyond the edge of the battery cell 11, thereby preventing contact short circuits between adjacent middle aluminum bars 2.

When the number of battery cells 11 of the module block 1 is an even number, the poles of the front and rear battery cells 11 of the first pole row are respectively used to connect to external lines; the outer aluminum bar 4, the remaining poles of the first pole row are grouped in twos, and the outer aluminum bar 4 connects a group of poles of the first pole row; the poles of the second pole row are grouped in twos, and the outer aluminum bar 4 connects a group of poles of the second pole row; two outer FPCs 5, one outer FPC 5 is connected to the outer aluminum bar 4 of the first pole row and the pole of the first pole row used to connect to external lines; the other outer FPC 5 is connected to the outer aluminum bar 4 of the second pole row.

or,

When the number of cells 11 of the module block 1 is an odd number, the poles of the cells 11 at the front end of the first pole row and the poles at the rear end of the second pole row are respectively used to connect to external circuits;

The outer aluminum bar 4, the remaining poles of the first pole row are grouped in twos, and the outer aluminum bar 4 connects a group of poles of the first pole row; the remaining poles of the second pole row are grouped in twos, and the outer aluminum bar 4 connects a group of poles of the second pole row;

Two outer FPC5, one outer FPC5 is connected to the outer aluminum bar 4 of the first pole row and the pole of the first pole row for connecting to the external line; the other outer FPC5 is connected to the outer aluminum bar 4 of the second pole row and the pole outer FPC5 of the second pole row for connecting to the external line.

Furthermore, it also includes an external aluminum bar 6, which is connected to a pole connected to an external circuit, and an outer FPC 5 is connected to the external aluminum bar 6. According to the above, a battery module has two poles for connecting to an external circuit, and at least one of the poles is connected to the external aluminum bar 6. In this embodiment, both poles for connecting to an external circuit are connected to the external aluminum bar 6.

Similarly, the outer FPC5 is connected to the outer aluminum bar 4 and the external aluminum bar 6 through the nickel sheet 7. Specifically, each outer aluminum bar 4 and the external aluminum bar 6 is connected to a nickel sheet 7, and each nickel sheet 7 is respectively connected to the outer FPC5. One end of the outer FPC5 extends outward to the outside of the module block 1, and this end is the output end of the outer FPC5.

Based on the above, it should be noted that:

First, all the battery cells 11 of all the module blocks 1 are connected in series to form a series battery module, and between two battery cells 11 of the same module block 1 there must be battery cells 11 of other module blocks 1 connected in series.

Secondly, if the number of battery cells in module block 1 is an even number, it can be known that the pole at the front end of the first pole row is used to connect to the external circuit. Then, after all the battery cells 11 of all module blocks 1 are connected in series, the pole at the rear end of the first pole row must be used as the connection point for connecting to another external circuit. It can also be understood that the input and output connection points of the power supply circuit after the series connection of all module blocks 1 are the front end pole and the rear end pole of the first pole row respectively.

Third, if the number of battery cells in module block 1 is an odd number, it can be known that the pole at the front end of the first pole row is used to connect to the external circuit. Then, after all the battery cells 11 of all module blocks 1 are connected in series, the pole at the rear end of the second pole row must be used as the connection point for connecting to another external circuit. It can also be understood that the input and output connection points of the power supply circuit after the series connection of all module blocks 1 are the front end pole of the first pole row and the rear end pole of a pole row respectively.

In the present embodiment, preferably, the number of battery cells 11 of the module block 1 is 14, and the number of module blocks 1 is two. It can be known that the number of intermediate aluminum bars 2 is 14, and the 14 intermediate aluminum bars 2 connect two adjacent poles of two adjacent battery cells 11 of the two module blocks 1. Correspondingly, 14 nickel sheets 7 are arranged on the intermediate FPC 3, and the 14 nickel sheets 7 are connected to the 17 intermediate aluminum bars 2 one by one.

In particular, in the arrangement direction from the front end to the rear end, the first pole and the last pole of the first pole row serve as the input and output ends of the battery module composed of the two-ground module blocks 1, so that the first pole and the fourteenth pole of the first pole row are respectively connected to the external aluminum bar 6, and the second pole to the thirteenth pole of the first pole row are grouped in pairs, and the specific grouping is: the second pole and the third pole, the fourth pole and the fifth pole, the sixth pole and the seventh pole, the eighth pole and the ninth pole, the tenth pole and the eleventh pole, the twelfth pole and the thirteenth pole are grouped in pairs, and a group of the above poles are connected by the middle and outer aluminum bars 4, so the two external aluminum bars 6 and the six outer aluminum bars 4 are connected to an outer FPC 5.

In addition, the specific grouping of the second pole row is: the first pole and the second pole, the third pole and the fourth pole, the fifth pole and the sixth pole, the seventh pole and the eighth pole, the ninth pole and the tenth pole, the eleventh pole and the twelfth pole, the thirteenth pole and the fourteenth pole are grouped in pairs, and a group of the above poles are connected through the middle and outer aluminum bars 4, so the seven outer aluminum bars 4 are connected to another outer FPC5.

Furthermore, the middle FPC3 and the outer FPC5 are provided with output ends, and fuses 8 and/or connectors 9 are provided on the output ends. Preferably, the fuse 8 is a chip fuse, which occupies less space, and the specification of the fuse 8 is 500mA; thus, the chip fuse has the advantages of small space occupation; in addition, the fuse 8 can also select other types such as plug-in fuses, which will not be repeated here.

Specifically, the connector 9 on the outer FPC5 on the above-mentioned first pole row is preferably a 20-pin (and pin number) B-key connector 9 (the model of the connector 9 is existing and will not be described here); the connector 9 on the outer FPC5 on the second pole row is preferably a 12-pin connector 9; furthermore, the connector 9 on the middle FPC3 is preferably a 20-pin A-key connector 9 (the model of the connector 9 is existing and will not be described here); it should be noted that the number of pins of all connectors 9 is set according to the circuit setting, that is, there are several circuit connection points, and connectors 9 with at least several pins are selected accordingly. Of course, since the connector 9 is a standard part, if the circuit connection points are seven, a connector 9 with eight pins is selected; more preferably, in order to improve the voltage resistance of the connector 9, the pins in the same row are usually connected to the circuit connection points at intervals. As above, if the circuit connection points are seven, a double-row pin connector 9 is selected, and the number of pins in each row is seven.

More preferably, it also includes a reinforcing plate 10, and the output end is arranged on the reinforcing plate 10 so that the output end is supported, that is, the connector 9 and the fuse 8 are both arranged on the reinforcing plate 10. Preferably, the reinforcing plate 10 has no plastic material and has a flame retardant grade of FR4; the reinforcing plate 10 is provided with a fixing hole, and the fixing parts (including but not limited to screws) are fixed in the fixing hole to fix the reinforcing plate.

In addition, a blister bracket 12 is arranged on the top of the module block 1, and the middle aluminum row 2, the middle FPC 3, the outer aluminum row 4, the outer FPC 5 and the external aluminum row 6 are arranged on the top of the blister bracket 12; specifically, the blister bracket 12 is provided with slots for installing the above components to facilitate the installation of the above components.

In addition, the specific sizes of the above-mentioned blister bracket 12, the middle FPC 3, the outer FPC 5 and the reinforcing plate 10 can be set according to actual needs. In this embodiment, the preferred examples are:

The length of the blister bracket 12 is 595mm-605mm, preferably 599mm, the width is 565mm-575mm, preferably 572mm, and the thickness is 5.5mm-6.5mm, preferably 5.9mm.

The length of the middle FPC3 is 600mm-620mm, preferably 613mm, the width is 20mm-30mm, preferably 25mm, the size of the reinforcing plate 10 at the output end of the middle FPC3 is: 80mm-90mm, preferably 88.3mm, 20mm-30mm, preferably 23mm, and 0.3mm-0.7mm, preferably 0.5mm. Two fuses 8 are set at its output end; the length of the outer FPC5 of the first pole row is 600mm-620mm, preferably 606.2mm, the width is 20mm-30mm, preferably 23mm, and the size of the reinforcing plate 10 at the output end of the outer FPC5 is The length is 80mm-90mm, preferably 80.7mm, the width is 20mm-30mm, preferably 23mm, the thickness is 0.3mm-0.7mm, preferably 0.5mm, and two fuses 8 are set at its output end; the length of the outer FPC5 of the second pole row is 550mm-570mm, preferably 563.6mm, the width is 20mm-30mm, preferably 21mm, and the size of the reinforcement plate 10 at the output end of the outer FPC5 is: the length is 95mm-105mm, preferably 100mm, the width is 20mm-30mm, preferably 23mm, and the thickness is 0.3mm-0.7mm, preferably 0.5mm.

Furthermore, if the number of module blocks 1 is greater than two, for example, three module blocks 1 are required, and the arrangement of the two outer aluminum bars 4 remains unchanged and will not be repeated here.

A battery pack includes the above-mentioned battery module and a box, wherein the battery module is arranged in the box. This is the prior art and will not be described again here.

The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims (10)

1. A battery module, comprising:

The battery pack comprises at least two parallel module blocks (1), wherein each module block (1) comprises a plurality of battery cells (11) which are sequentially arranged, the battery cells (11) of two adjacent module blocks (1) are aligned one by one, and a group of polar columns is arranged at the adjacent ends of the two battery cells (11) of the two adjacent module blocks (1) aligned;

an intermediate aluminum row (2) connecting a group of the poles in series to connect two aligned cells (11) of two adjacent module blocks (1);

an intermediate FPC (3) connected to the intermediate aluminum row (2);

The two rows of poles at the outermost sides of the two outer side module blocks (1) are respectively a first pole row and a second pole row; the positive and negative poles of the first pole row are self-connected, and the positive and negative poles of the second pole row are self-connected so as to form a series circuit with all the electric cores (11) of the two module blocks (1).

2. The battery module according to claim 1, wherein,

In the arrangement direction of the battery cells (11), one end is the front end of the module block (1), and the other end is the rear end of the module block (1);

When the number of the electric cores (11) of the module block (1) is even, the poles of the front end and the rear end electric cores (11) of the first pole row are respectively used for being connected with an external circuit;

The solar battery further comprises an outer aluminum row (4), wherein the other poles of the first pole row are in pairs, and the outer aluminum row (4) connects one group of poles of the first pole row; the poles of the second pole row are two by two in one group, and the outer aluminum row (4) connects one group of poles of the second pole row;

The solar cell further comprises two outer FPC (5), wherein one outer FPC (5) is connected with an outer aluminum row (4) of the first pole row and the pole of the first pole row for connecting with an external circuit; the other outside FPC (5) is connected with an outside aluminum row (4) of the second pole row;

Or alternatively

When the number of the electric cores (11) of the module block (1) is an odd number, the poles of the electric cores (11) at the front end of the first pole row and the poles at the rear end of the second pole row are respectively used for being connected with an external circuit;

The solar battery further comprises an outer aluminum row (4), wherein the other poles of the first pole row are in pairs, and the outer aluminum row (4) connects one group of poles of the first pole row; the other poles of the second pole row are two by two in one group, and the outer aluminum row (4) connects one group of poles of the second pole row;

The high-voltage power supply further comprises two outer FPC (5), wherein one outer FPC (5) is connected with an outer aluminum row (4) of the first pole row and the pole of the first pole row for connecting with an external circuit; the other outside FPC (5) is connected to the outside aluminum row (4) of the second pole row and the outside FPC (5) of the pole, which is used for being connected with an external circuit, of the second pole row.

3. The battery module according to claim 2, further comprising an external aluminum row (6);

The external aluminum row (6) is connected to the pole connected with an external circuit;

The outer FPC (5) is connected to the external aluminum row (6).

4. A battery module according to claim 3, further comprising a nickel plate (7);

The middle FPC (3) is connected to the middle aluminum row (2) through the nickel sheet (7);

The outer FPC (5) is connected to the outer aluminum row (4) and the outer aluminum row (6) through the nickel sheet (7).

5. A battery module according to claim 4, characterized in that the middle FPC (3) and the outer FPC (5) are provided with output terminals;

The output end is provided with a fuse (8);

And/or the number of the groups of groups,

The output end is provided with a connector (9).

6. A battery module according to claim 5, characterized in that the fuse (8) is a patch fuse.

7. The battery module according to claim 5, further comprising a reinforcing plate (10),

The output end is arranged on the reinforcing plate (10) so that the output end is supported.

8. The battery module according to claim 1, wherein the middle aluminum row (2) has a square structure, and the width dimension of the middle aluminum row (2) in the thickness direction of the battery cell (11) is smaller than the thickness dimension of the battery cell (11).

9. The battery module according to any one of claims 3-8, further comprising a plastic uptake support (12), wherein the plastic uptake support (12) is arranged at the top of the module block (1), and the middle aluminum row (2), the middle FPC (3), the outer aluminum row (4), the outer FPC (5) and the external aluminum row (6) are arranged on the plastic uptake support (12).

10. A battery pack comprising the battery module according to any one of claims 1 to 9 and a case, the battery module being disposed in the case.